SU523947A1 - Kolpakova furnace - Google Patents

Description

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 1 invention relates “to Magrevat’s equipment of thermal workshops and can be spawned at the metallurgical plants of the D: Compound,

A well-known furnace for heating b5et, zlla in ru § -LeNaH containing a stand and a muffle installed on it, an injector, which is inserted into the tag of an insulating .co-lpak to burner

va. In order to provide quality in | -. Va rolls the furnace is equipped with fans JQ

:. Circulation under the gas atmosphere atmosphere. In this furnace, the tet / ho from the heated: l is transferred to the rolls mainly

radial direction.

However, the 3 radial direction is to the эф eff-jg fcient. The thermal conductivity of a coil is several ko less than axial, therefore, in i inpouecce the heat is significant, uneven temperature but radius of the joHOB, the location of the thrusting devices 20 in the lower side of the shaft is equal to the unequality of the .JBa in height of the core, The presence of ToMiTopai-vnnofi an. Ch.chichomchrnosti rtridatel (go... H ts quality na1- | eva and .-: || -. H .-, j; -.;: C-iii.25

Also known is the Ksotpak oven with antenna tubes installed along the entire height of cap 2. This way Inanj jaTey ieE makes it possible to reduce Harpesa unequalness over high caMKHj that doesn’t rotate it in the radial direction The charge occurs due to the mother-side exchange of the side surfaces of the rolls with the colder surface of the muffle during the cooling process. The temperature is irregular with respect to the radkus of the rolls.

i The purpose of the invention is to improve the quality of heating the coils for cooling, an increase in productivity and a reduction in fuel consumption.

The aim of the project is that in the pre-earth bell-burning furnace the burners of My are devices that have the ability; the hook plates from the vertical axis of the furnace are installed; new ones on the stand and iodine are combined with Kojir.iajcji and are designed as a set. 7К-, it is)) about s-p - TviKaabHDjo ..1 with h: i1- / 1me1, which is diverted to G (.). 1; T1 / iifbuor. u, af "KfxTii" t ..- Guy

butt, TG.y; .: f li-.F.:.- li, :: t illJ-F ,, PG1IK; M

Each burner device is connected via a pipeline to a smoke exhaust system.

The drawing shows the proposed bell furnace in the section.

The furnace contains a stand 1, a muffle 2, a cap 3, burners 4 and 5, suspended in the form of a vertical distribution manifold 6 with pipes 7 having nozzles 8 at the ends, a drive 9 for rotating the eagle of the stationary devices 4 and injectors 10 located under stand 1 and on the cap 3, the support frame 11, the bottom plate 12c installed on her cage rolls and sand shutter 14.

The furnace works as follows. The coils 13 to be heat treated are placed on the bottom plate, covered with muffle 2, rinsed under the muffle with a protective gas, heat insulating cap 3 is installed, the rotational drive 9 of the burners 4 and 5 is turned on and gas is ignited. Combustion products are removed from the furnace with the help of injectors 10, where a part of the combustion products are ejected to the burner devices. 4 and 5, the heat of the combustion products is transferred to the lid of the muffle 2 and the bottom plate 12 from their inner surfaces — the ends of the rolls — by radiation. The rotation of the burners allows to obtain a symmetric heating of the ends of the rolls, in order to avoid a sharp impact of the fssel on the lid of the cap and the bottom plate of the nozzle 8 mounted around a circle whose diameter corresponds to 1 / 3-3 / 4 width of the winding of the rolls, and tilted in the direction of the burners at an angle 30-70 to heated surfaces.

After the end of the heating process, the cap 3 is removed, and the burner 4, installed - 3, on the stand, is used

for accelerated cooling of the lower part of the cage, passing air through it.

Taking into account that the thermal conductivity coefficient in rolls in the axial direction significantly exceeds the thermal conductivity coefficient along the radius, heating and cooling in the proposed furnace occurs more intensively and with less temperature irregularity.

Claims (1)

Invention Formula Bell-type furnace for heat treatment of metal in coils, containing a stand with sprayers installed on it, an injector for removing combustion products, built in a heat insulating hood, and burners, 4TOiC, to improve the quality of heating and cooling coils, increase furnace performance and reduce specific fuel consumption, the internal devices burned in the form of a vertical distribution manifold with symmetrically diverging in the horizontal plane from its end pipelines with nozzles and tanovleny to stand under the vault cap rotatably about the vertical axis of the furnace, each burner unit via a conduit connected to the chimney boiling system. Sources of information taken during the examination: I, V.N. Apterman and others. Bell furnaces Metallurgists, M., 1965, p. 71, fig. IV-76 - prototype 2, Handbook of the designer of furnaces of rolling production, ed. V.M. Tymchaka, Metallurgists, M., 197 O, vol. I, p. 929, fig. ХХХ111-11б- analogue.